Pump-jack assembly



April 23, 192:9 c. H. BALDWIN Puur JACK As'sElBLY Filed Feb. 14. 1927 3 Sheng-Sheet l INVENToR. u CZULSHIY. alLvl/e,

' A ORNE V-Plil 23, 1929- c. H. BALDWIN PUMP JACKASSEIBLY 3 Sheets-Sheet 2 Filed Feb. 14. 1927 l ATTORNEY hril `23, 1929- c. H. aALDwm Pm JACK ASSEIBLY Filed Feb. 14, 1927 {shuts-sunt 3 IN VEN TQR. li'azldzvuv/j ATTORNEY CloiseH 112 B. Z

Patented Apr. 23, 1929.

UNITED STATES PATENT OFFICE..N

CLQISE H. BALDWIN, OF FORT WORTH, TEXAS, ASSIGNOR T0 TEXAS STEEL COMPANY,

0F FORT W'ORTH, TEXAS, A CRPORATION 0F DELAWARE PUMPJACK ASSEMBLY.

Application tiled February 14, 19272 Serial No. 16,076.

This invention relates to a certain new and improved pump jack assembly, and has tor its object to provide, in a manner hereinalter set forth, an assembly of such class constituting a single sel'icontained unit thereby siinpliilying construction and installation and further materially reducing the cost ol' main tcnanee over the Atoi-ms ot' pump jack assemblies now in use. i

A further object ot the invention is lto provide, in a manner as hereinafter iorth, a pump jack assembly including a lubricating system which makes it possible to operate for a twenty-'tour hour period or longer with a single application of lubricant.

Further objects ot' the invention are to provide, in a manner as liei'eiiiatter set forth, a

pump jack assembly which is comparatively simple in its construction and arrangement, strong, durable, compact, thoroughly etiicient in its use, readily assembled, conven iently installed, and comparatively inexpensive to set up.

Vith the foregoing and other objects in view the invention consists of the novel construction, combination and arrangement of parts as hereinafter more specificallyv described, and illustrated in the accompanying drawings. wherein is shown an embodiment of the invention, but it is to be understood that changes.y variations and modilications can be resorted to which fall within the scope of the claims hereunto appended.

ln t-he drawings wherein like reference char acters denote corresponding parts throughout the several views:

Figure 1 is a side elevation of a pump jack assembly in accordance with this invention.

Figure 2 is a rear elevation partly in section, the section being upon line 2-2 Figure 1, and the structure shown in Figure 2 being upon an enlarged scale.

Figure 8 is a fragmentary view upon an enlarged scale and in vertical section of the pump end of the beam.

Figure l is a section on line 4-4 Figure 3.

Fi gurc 4^ a top plan view of the bearing element for the pivoted pump or polish rod connector. t

Figure is a fragmentary vieu' in side elevation ot' a modified form when a rigid supporting post is employed.

Figure 6 is a vertical sectional view ot' the upper portion of the modilied form shown in Figure 5.

Figure 7 is a section on line 7-7 Figure 5.

Figure 8 is a fragmentary view in vertical section ot' the lower portion ot the modified form shown in Figure 5.

Figure 9 is a section on line 9f-9 Figure 5.

Referring to Figures 1 to 4A of the drawings the pump jack assembly illustrated thereby is of the type in which a pivoted supporting structure is providedfor the beam employed to operate the pump orpolish rod or in other words for the beam which is used to reciprocate the pump or polish rod. i

The pivoted supporting structure for the beam or rather oscillatory structure for the beam comprises a pair of tubular posts 1, 2, ol? substantial height and arranged in spaced relation, and which are connected together at their u )per ends by an inverted U-shaped head mem er referred to generally by the reference character 3. The member 3 includes a head portion 4 and a pair of depending arms 5, (l. The arm 5, as well as the arm 6 is enlarged at its lower end and the post 1, as well as the post 2 is reduced at its upper end. The arm 5, as well as the arm 6 at its lower end is cut away. The upper ends of the posts 1 and 2 oppose the lower ends of the arms 5, G and are connected together b v the holdfast devices 7. The lower ends of the arms 5 and 6 seat on the shoulders 8 provided on the posts 1, 2. The upper end ofthe post 2 is of greater thickness, as indicated at 9, and is provided with a groove 10, which opposes a groove 11 formed on the inner face of the lower end of the arm The grooves 10 and 11 register to provide an oil channel for conducting or rather discharging lubricant into the post 2. Formed integral with the upper end 'of the post 2 is an inwardly extending and upwardly inclined combined lubricanttrapping and directing member 12 which leads to the inlet end of the lubricant passage or duct formed by the registering grooves 10 and 11. y

The head part 4 of the member 3 is chambered as at 13 to form a lubricant reservoir. The head parti/l. is also formed with a pair of openings 14 providing supply inlets for the reservoir 13. The bottom of the reservoir 13 is formed with a pair of outlet openings 15,

with which coinn'iunicate depending lubricant discharge spouts 1G, ll'ithin the reservoir 1li may be positioned a body of waste 17. '.lhe arm 5 oil the member 3 is 'termed ii'itermcdnite its ends with an enlarged opening' 1S and the arm (i of the member 3 intermediate the ends oi said arm is ioriued with an enlarged openine; 1l). The purpose of the openings 18 and 19 will be presently referred to,

The posts and 2 have secured to the lower ends tlierco'l1 a rocher member, retin-ed to generally by the reference chariuter 20 and which consists otf a cylindrical body portion 21 of substantial length. The body portion 21 in proximity to each, end thereoi" is formed with a cylindrical extension and the said elitensions are indicated at 22, 23. The extension 22 is secured 'within the lower end ot the pest 1 and the extension 23 is secured within the lower end et the post The body portions 21 is 'termed with a lengthwise extending; lubricant past-aire 2-1l which has its ends terminate adjacent the ends of the body portion 21. Each end ot the pas-:aleje 24: terminates in a duct which opens at the periphery of tbe body portimi 21 and is positioned exteriorly ot an extension or 223. The extension 23 is formed with a vertically disposed channel 26 which provides means ttor conducting' the luln'icant from the post 2 to the channel. 2i. The lubricant 'from the channel 2l is discharged by the ducts 253 into a bearing` member 27 secured in a casing' 28 mounted upon a suitable foundation or support 29. A cap member 31 is employed tor retaining' the rocker member 2O in the bearing;r 27. The lubricant which supplied to the bearingv 27 is a portion of 'the lul'iricant which is discharged 'troni the reservoir 13 and the dischar e. as well as the travel, of' the lubricant troni the reservoir 13 will be hereinafter more speci tieally referred to.

Carried by the head member ot' oppositely disposed con'il'iined and hearing' elements referred to generally by the reference chi'irarte Y l1', and as each is oi the same construction, but one will be described. :s the description ot one applies to the other. Each comb'ii'iell supporting and hearing' element consists ot' a cylindrical body portion 33 itin-ined with a socket Sel and tlanle'ed at its outer end as at 35. The socket 34 opens at the inner end ot' the body portion The flanges 35 abut against the outer tacos ot the arms 5, (i. The elements 31 and 32 are fixedly secured to the arms 5, G by hold tast devices 36 which extend throua'h the flanges 35 and the arms 5, 6. The holditast devices are counter sunl in the inner faces et the arms 5, 6. The lubricant discharge spouts 16 are spaced from the inner faces ot' the arms 5, G and each positioned in alinement with a port Si' 'formed in the body portion 33. The port 37 opens into the socket S-i.

The oscillatory beam which provide@l for 3, is a pair su ppm-ting;

the reciprocatioi'i of the pump rod 3S is re- :l'erred to generally by the reference character 3S) and it is constructed from a pair o'l oppositely disposed channel irons 10, -ll which are arranged and maintained in spaced relation. The pump rod 38 is suspended Atroni one end et the beam 39. Av coniiterbalance is susiieni'lcd from the other end ot the beam 3S) and which consists oi. a hanger rod #L2 carrying); on its lower end a weile'htr -l-l. The pump rod 3S as well as the hanger rod -l-2, are vertically adjustable rela-tive te the ends ot the beam 39 and the manner in which the rods can be adjusted will be presently reiterred to.

The beam 39 at a point between its transverse median and that end from which the connterbalance is suspended has secured therewith a con'ibined suspending' and pivot element il consisting of a body portion l5 which seats upon the channel irons l0, l1 and which has depei'ulinn' theretron'i a shank 4:6 positioned between the channel ironsl it), Lil and secured therewith by holdt'ast devices lil-7. The body portion '15 projects laterally t'rom each ot the channel irons and carries a pair ot oppositely disposed trunnions which are mounted in the sockets 3-1. The ports 37, in the body portion 232 provide means 'tor supplying' lubricant to the trunnions 18. The lul'iricant dripping' vtroni one oit the trnnn'ions t8 will be trapped by the member 12 and conducted to the post 2. and that is conducted to the interior ot the pont 2. by the oil conducting' channel 'formed by the registering `grooves 10 and l1, 'lhe body portion -15 ot the elen'ient Ail is spaced from the inner ends of the body portions 33 olE the elements 31', 32. The body portion 83 oit the elements 31', not onliv provide bearings ,tor the trunnions 18, but supports there for. The body portion 4:5 ot the element 44 is extended as indicated at 49, see Figure 1. so that it will have sufficient purchase on rthe top o't the beam 39.

Supported trom the elements 31', 32, well as being pivotally mounted thereon` is a pair et combined supporting` shifting and retaining members referred to generally by the reference characters 50, 51 which depend from the elements 31', 32 and incline in a direction towards the pump rod 3S from their upper towards their lower ends. The members 50, 51 associate with the supportingir structure, or rather associate with, the piyoted supporting! structure and also associate with an oscillatory swing, referred to `generally by the rei!- erence character 52', and which is employed for oscillating the beam 39 to proyidc'tor the recilirocation of the pump rod 3S. The inember 50 includes a head 52 and a tubular shank 53. The head 52 formed with an opening 54 for mounting on the element 31' and said head 5.2 is also provided with a tapered port 55 arranged below the discharge spout 16 and registering with a port or opening 37 andthe lill) lill lilo

i port provides means for lubricating the inner face ofthe head 52. The lower part of the head is provided with an inclined lubricant conducting channel 56 which opens into the tubular shank 53 for conducting lubricant thereto. The lower portion of the head 52 is furthermore provided with an inwardly extending and upwardly inclined combined lubricant trapping and directing element 57 which leads to the channel 56 for directing the lubricant thereto. The element 57 is arranged to trap the lubricant from the trunnion 48 which is mounted in the element 31'. The member 51 comprises a head 58 and a shank 59 and which are secured together by the holdfast devices 60. The head 58 is not provided with the channel 56, or a trapping element 57 but otherwise than that as stated it is constructed in the same manner as the head 52. That is to say it is provided with a port 55 which is arranged below the lubricant discharge spout 16. The shank 59 is tubular but no lubricant is conducted therethrough. Secured in the lower end of the shank 53, by the holdfast devices 61, is a depending plug 62, formed with a lubricant channel 63. Se cured in the lower end o the shank 59 and Adepending therefronnis aplugtet. The holdfast devices for securing the plug to the shank 59 are indicated at 65. The plug 62 near its lower end is formed with a diametrically disposed socket 66 which opens at the inner side of the plug, and the plug 64 at its lower end is formed with a diametrically disposed socket 67 which opens at the inner side of such plug. Extending within the sockets 66, 67 is a rock shaft 68 having reduced terminals 69 which project through the plugs and carry securing nuts 70. The shaft 68 is formed with a lengthwise disposed channel 71 having an intake 72 which registers with the channel 63 whereby the lubricant supplied to the shank will be conduct-ed to the channel 71. The outlet o t' the channel 71 is indicated at 73 and which opens at the periphery of the shank 68. The plugs `62 and 64 are formed with lubricant discharge ports 7 4t which lead from the sockets 66 and 67. The shaft 68 is mounted in a bearing 75 which is secured by the holdfast devices 76 to the swing 52' at the corner thereof. The swing 52 being of triangular contour or in the form of a bell crank. The bearing is secured on the upper face of the swing 52'. The bearing 7 5 at each side thereof and below the )ort 74 is formed with laterally ext-ending com ined lubricant trapping and directing elements 77, and each of which is formed with a depending lubricant discharge spout 78 which are arranged exterior-ly of the swing 52'. The elements 77 have openings 79 which register with the spouts 78. The function of the discharge spouts 78 will be pres-` ently referred to. The members 50, 51 are arranged extcriorly of the swing 52', that is to say at their lower ends, and at their upper ends are arranged within the head member 3 ofthe pivoted supporting structure.

The swing 52 comprises a pair of opposed spaced longitudinally disposed channel irons 80 Aforming the lower arm of the swing and a pair ot' vertically disposed spaced bars 81 forming the upper or vertical arm of the swing. The arms of the swing are connected together by a bracing means, as indicated at Secured between the channel irons which gt'orm the lower arm of the swing by the holdiiiasi dcrice till. is the head't-l oit" a depending rocker member which is mounted in a bearing 86 anchored to the casing 27. The discharge spouts 78 provides means for lubricating the rocker member 85.

Mounted on the free end of the lower arm ot' the swing 52', is a bearing 87, for a rocker member 88, which depends from the lower end ot' an actuating rod 89, for the beam 39. The upper end of the arm 89, carries a concaved cup 90 which is mounted against a globular extension 91 carried on the bottom of a lubricant container or reservoir 92, which is fixedly secured between the channel irons of the beam 39 in proximity to the pump rod 38. The lubricant from the reservoir 92 is supplied to the cup 90 by the discharge passage 93. The rod 89 pivots or ulcrums against the extension 91 when the swing 52' is shifted in a direction to provide for the upward movement ot' the rod 89. The securing means for the reservoir 92 is indicated as at 94.

The means for connecting the pump rod 38. as well as the hanger rod 42, to the beam 39 are of like construction, and therefore the description of one will apply to the other. The said means consists of a casting 95 formed with a reservoir 96, a vertically disposed opening 97. a pair of concavities 98, and a bricant supply duct 99 leading from the `*ervoir 96 to a concavity 98; The casting 95 further includes a depending extension 100 which is arranged between the channel irons of the beam 39 and is tixedly secured therewith as at 101. Mounted on the casting 95, is a rod connecting element 102 formed with a vertically disposed opening 103 for the passage of the rod 38 or 42. The element 102 is formed with a pair of oppositely disposed trunnions 101i which are mounted in the concavities 98 and lubricated from the ducts or channels 99 due to the passage of lubricant therethrough. The rod 38 or ft2 is adjustahly connected to the element V102 by a pair of oppositely disposed set screws 105. T he ele-` ment 102 is pivi'itally supported in the casting 95. The elements 95 and 102 are carried with the beam 39 during the movements thereof. i

' Carried by the upper arm of the swing 5.2', at the tree end ot' such arniis a stirrup box 106 formed with a plurality of grooves 107 for selectively receiving a stirrup 108. which is connected bythe coupling 109 to the pull 110 liftad 1101111" tionm 0101111111011 l 00111.1iv strung 0n 1.11.0 111111.

1111011, 1111101011); 1110 0101110.11 l; 01111 1.1111 .1 with the 1'011 151. 111:1 11111111 1.'.1' to 1110110111110111.11115: 01:' 1111011111111' o1 11.10 111tt01f.

1171111 105173001; Vto 1110 111011111 in 11111111' "f o* 11011011 ,001111111111151 .7 111111011 11nd 115:0(1111 :1001111111 1. tlr0o1 111-1 :1t 11S-1. t0 15110 01111.11 is 111011111011 01.' 111101101` port or 11:11.10 1111. 511111111111111 112 :it 1110 1111001' 03.11111 0'011 11:1 11011151' finodlj/ 1100111011 111101 i th0 hnhltnnt 11.1,'1'0011 11.11 :110 l10n-:l 1110000' 111' 011011 101'111011 1 h 1111. 1111115111111 1101A 1l to which 1:1 0.111111111111111 1.,'01111q 't .1, 1011 1110 11111101' 01111 oit im. 11101111011. 1.111100 11101111101' 1.15.1, 1110 1.111101' 11111111111; 11111011101' 01111 11311111111 1101.111011 1111 :1t 1F20 t0 11110 0110111; 1111. 111.10 11111101' 0111. 01" th0 1111100 1.1.9 is 11dj1'1511111111.vvv 001111001011 t0 111.0 031.0051011 11S. :1S 111i 121. '1.11110 11011110 1 1 two 11101111001 111110011 119 11170 0111111051161 1 11110 11011110 117 :1.1'0 1111111111001. in 0111100011. 011110011 1011111011.

11111011 hond 11101111101.' 11T 111701111011 with 11. Divot 122 'for f1 11011110111.11Y (115111011011 :11'111 193, 11111011 is 101111011 nt 1011.011101' `11d "with :111 1111- :-:tnndinu inclined 0Xt0111=i0n 1211i, 1111111111); s0- 0111'0d thirnwith :u: :1t-195 11 001111111111' 111011 l1 1215. 11111011 :111m 123 is 101111011. with 0.1. in.- wnrdly 0xt0nding cylnrlrf'ul.. 111'1'1'71'111101'111100 127, 15015111001 with 11 510011011 19511. 11 111.110 1.01'111011 with n V -11111111001 portl 1911 11111011 opens into th0 socket 1.28. .111'1'1 .1111001 1.1015110011 1110 arms 1Q?) is :1` 11011d 11101111101' 0r 01111111151 129, 101111011 with 011011111331 130 1111' 1110 11:1@ i 1110 111'0t11111-11'111100 127. T110 011:11: if: 11011'111'011 t0 1110 11111151 1521? 1.11' 15110 .l 112111111 d0- 1'10011 1511. und 132. T110 00st .gg 1 f1 11tita 110110111 is '1101111011 11111111 11n 01101111151' 3% 11110111111 which 011110111111 t1101'1011111 .11"1'0unt011 011 11110 11011111 19 if i 11111111 1110111- 1101' thm'nfo" 001111111111110; 11y 1.10111; 1101111011 1.511

111011161011 111111 11. 115111' 01. 0111101111 diC 11d 1111111110101 T 11011;, 110111011 111- 219 1111'1 n00ur0d t1 01011'1111 11." 11011111101' 1101110011 1217. T j01111.11 15911 .1 .011111011 i11t110 510011010 128. T10 :1t its; 1011 iff; 't0r1n0d with u 1011' 1118, 111112 111111 01.1 1101101111 difwhzu'ge spouts 111.0 11.1' ungt'd 01'01' tl10 ports 199 .tor feeding 1111111011111: t0 th@ s00k0t 12S.

1^1tt110l10d t0 011011 coupling; 111011111011 126 is 11 d1nrnwardly 0;;10111'11111;l 11nd 101111111111111 in- 011'11011 0011111111011 11111011111, rctaininf.; 11nd .shifting 11101111101' 110. T110 .11101111.1010 1.-:10 001'1'0- 111.1111111 t0 'the 11101111J01S 51.11 :11 Slmwn 111 Figur() f2. 1G: 0h. 11101111101' 110 111111111101111' 001111011011 to :1 001111111151' 11101111101.' 1211, :111 :1t 111. '1`h0 101101.' 0111.111 01 1110 1110111110111, 1111 111'0 {11'0` 111110 01 1.11.0 swing 52. A pivot 11.21 is pr0- 15111011 101' the plugs 142 11nd which :11.110 001l- 11it11t0 .1110111151 for 0011110011110` 1110 1110111110111 11111 t0 the swing 52. The Swing; 5 0111'- '1011 11 casting 111-1 111011111011. with 11 luln'h'nutI '1i-110.1."1'0i1' 1115 `for supplying; [11111101.1111: t0 t110 11u01A 1121. T110 pivot 1121 0111011115 thrmuih 1.11.0 011.0111111' 111. '.1110 100k 11101111101' o1.' pivot 101' 11110 1111111111' 52, in the tnrxn 5.1101111 in 1111;

1 111:, indicatml :1t 1111,. Figura', 51.

.ih r0S p00t t0 t110 100111 01101111 in. 111111110 s 11 not uhricatd in the s111110 11111111101.' :1:1 11110 101'111 1411011111 in Figure 1110 t0 11110 1:1011 that 1110 .Quppnrting structuw is 0l 11110 rigid :111.11 not 11.10 100111.11; typ0.

111110101100 than that :1s st11t0d the ironstrut'- 1011 111110100001 in 11110 101111 shown in 191111110 "0111.11 110 13110 s111110 :1&1 that 0111101.05011 in 1h11 1'111 011011111 by Figure 1.. AS 1.10'

1 .01'0 011111111 '10 111111101111115; arrangement is 5011101111111; 1111.010111 than the 'form 011011111 in 11101110 5 1111111 that with respect t0 tl10 :form shown in '111511110 1 is in Figure 5 the Supllorting strut:- t11r0 is not l11101'i0at0d at .its 1.011101.' 01111111111 1110 111011111010 d0 110t 1111110 111011111@ t0 p10- 1'1110 :tor thev lubrication otl the pivot 11101111101.' 113 undv the rocker 11G.

T110 construction 0s 01150105011 in 00111100w tion with 011011 101'111 111011111001 11 1.1111010 0011- tained unit, under 51.1011 0011011110011 111111111111*- .ingr construction, i11stall11ti011 und 10111101111; 00st 01" 11111int0nz11100, 11s 11011110 providing V101' lubrication.

ity is thought the many ndvnntugos 0f :1 111111111 100k i1ss0111b1y, iu :1000111111100 with this 111111011151011, 01111 110 101101111* 11111101's1t00d. 11nd 1111110111111 the preferred 011113111111111111114` 0lvl 11110 inronton is as illustrated and 111011011111111, yct it is t0 110 understood that 0111111005 in 1110 d0- 111110 01 00nSt1u0ti0n 01111 110 111111. 111111011 will 1111.1. within 1110 s100110 01g 1110 invention 11:1 01111111001..

That I 01111111 is Y 1. A pump jack 1103011111151 comprising 11 t'oiinterbnlnnced 0110111511111117 1.100111 adapted t0 1.10 0011110015011 1t one 01111. with 11 pump r0 l1 11 111111111011011 Supporting 11101111101' 00111100t0d t0 11110 1.1011111 int0rn'10diut0 the ends 111101001'. :1nd 11 Supporting structure for :1nd extt-rndinj.; 1.111010 said 11101111101' :1nd 111011.1(11110l 110111111110 ttor the trunnions 0f J110 10H01'.i S0111 Supporting struct-ure 'urther including' 11 lubricant 11.10.011 with 1111510 :1111111011 plugs 1-12, T110 111.vr 5 112 1110 011110111110151 11111110.1011. with 1'0 1111001; t0 011011 011.101' 1nd 111'0 1111111111011 :1t 0:11:11

reservoir at its top positioned over said member anzi Learn and means for supplying lubricant 'trom the reservoir to the bearings tor said trunnions.

A pump jack comprising a counterbalanced oscillatory beam adapted to be connected to a pump rod, a trunnion supporting' structure iior and connected to the beam, a supporting struct-ure for said member and inci'udin, bearings for the trunnions of the said structure further including a t reservoir and means i'or supplying cant from the reservoir ifor said trun nions id supporting structure further including a rocking member at its lower end, .supporting means for said rocker member', and means tor conducting lubricant from one ot the innion bearings to the supporting means ier the rocker member.

il. A pump jack assembly comprising a counterbalanced oscillatory beam adapted to be connected with a pump rod, a trunnioned supporting member for and connected to said beam intermediate the ends ot the latter, a supporting structure Yfor and extending above said member and including bearings for the trunnions oi' the latter, said structure further including a lubricant reservoir at its top p0- sitioned over said member and beam and means for supplying lubricant from the reservoir to the trunnion bearings, an oscillatory swing arranged adjacent to said structure, a pivoted actuating bar extended from said swing and fulcruming against and .free of connection with said beam, and a pair ot combined shifting and retaining members pi'votally connected at the lower ends thereof with the bottom of said swing and at theirV upper ends with said supporting structure.

fl. A. pump jack assembly constructed in accordance with claim 3, means for pivotally mounting the lower end ot said supporting structure, and means for conducting lubricant trom one ot the trunnion bearings to the pivotal supporting means for the lower end ot' said structure.

5. A pump jack assembly constructed in accordance with claim 3, means tor pivotally supporting said swing, means` tor piyotally supporting the lower end ol said supporting structure, means for conducting lubricant from one of the t-runnions ot` said supporting member to the means for pivotally supporting the swing, and means tor conducting lubricant from the other of the trunnions ot the supporting member to the supporting means at the lower end of said structure.

6. In a pump jack assembly a counterbalanced, oscillatory, eccentrically mounted beam, a casting secured to one end thereof and provided at one side with a lubricant reservoir, a pair of lateral depressions centrally thereof and ports leading trom the reservoir to said depressions, and a tubular pump rod connecting member provided with trunnions seated in said depressionsend further provided with means for adjustably securing the rod therewith.

7. ln a pump jack assembly a counterbalanced. oscillatory, eccentrically mounted beam adapted to be connected to a pump rod, an oscillatory swing free ot' connection to said beam, means to provide a lubricant reservoir fixed to said beam and having a depending globular extension, a beam actuating rod pivotally connected at its lower end to said swing and having its upper end provided with a semi-spherical shaped cup free ot' connection to and fulcruming against said extension to provide in connection with the latter for universal movement of the beam with r spect to said rod, said cup receiving lubricant from said reservoir.

8. A pump jack assembly comprising a base, an oscillatory swing pivotally mounted at one end thereon, a supporting structure mounted on said base adjacent said swing, a counterbalanced, oscillatory, eccentrically mounted beam adapted to be connected to a pump rod and provided with an extension, a beam supporting member positioned within said structure below the top the reot', said member including a pair of trunnions mounted in the inner face of the sides ot said supporting structure, a pair of colnbiued retaining and shifting members pivotally connected with said swing at its pivoted end and with said supporting structure near its upper end, and an actuating bar pivotally connected at the lower end thereot` to the non-pivoted end of said swing and having itsl upper end tulcruming against the eX- tension arried by the beam.

S). A pump jack assembly constructed in accordance with claim 8, means for pivotally supporting the lower end of said supporting structure, means for supplying lubricant to the upper end of said actuating bar, and means at the top of said structure and positionod over said member for supplying lubri cant tothe trunnions of said supporting member.

lll. A pump jack assembly comprising an inverted Usbaped supporting structure pivofted at its lower end, a supporting member trunnioned within the inner faces of the sides ot' said structure below the top thereof, an oscillatory beam carried by and eccentrically mounted upon said member and extending through said structure, an oscillatory swing positioned below said beam adjacent said structure, shitting connections between said structure and swing, and an actuating bar interposed between the beam and swing, said bar having its lower end pivotally connected with the swing, and 'further having a fulcrum at its upper end coacting with the beam.

l1. A pump jack assembly constructed in accordance with claim l0, said bar provided at .its upper end with a semi-spherical cup,

Said beam provided with a globular extension riding Within and against the cup to provide the fulcrum for the upper end oil? the bar and for universal movement of the beam relative to the bar.

12. A pump jack assembly constructed in accordance with claim 10, said beam formed with a depending globular extension formed With a lubricant discharge port, said bar having its upper end provided with a Semi-elmerical cup riding,r against Said extension, said extension and cup forming' the lulcrum 'for the upper end of the bar and for universal movement of the beam relative to the bar, and meane` for supplying lubricant to Said port .for luln'icatinglr the extension and cup.

15:5. In a pump ack assembly an oscillatory beam, means for adjuetably connectingl a, pump :rod to one end thereof, means 'for adjustably connectingr a counterbalance Vto the other end thereof, meaneI carried at the ende ol.l the beam for supplying4 lubricant to both of said crmnecting means, a trunnioned eup- 14. A pump jack aseembly constructed in accordance with claim 13, the said eupporting means previiiled at its top with means for lubricating the trunnione of Said membei'.

ll In a pump ack aseemllly an oSillatory b aun lor reciprocating a pump rod, a trunn ioned supper-tinar member ior said beam. a supportingvr Stri'icture includiiml bearings For the truxmiona of :mid member und liurtber including' menne ilor supplying, lubricant to ,auch trunnione, operatingmeans lior said beam and imwliuling.;l an oscillatory piwnally fa'lpported saving, and means vFor supplyii're; lubricant 'from Said .Caiman-ting structure to the pivot for the swim.

ln testimony whereof, l allix n j; Siglmlzure hereto.

CLOISF) lvl. BALDVTN 

